Water-tube boiler



(Nom odel.)

W. G. STUOKBL. WATERTUBE BOILER.

Patented June 29, 1897,.

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IVILLIAM O. STUCKEL, OF CHICAGO, ILLINOIS.

WATER-TUBE BOILER.

SPECIFICATION forming part of Letters Patent No. 585,487, dated J'une 29, 1897. Application filed December 12, 1896. Serial No. 615,491. (No model.

To all whom it may concern.-

Be it known that 1, WILLIAM G. SrUcKEL, of Chicago, in the county of Cook and State of Illinois, have invented a new and Improved IVater-Tube Boiler, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved water-tube boiler which is simple and durable in construction and arranged to insure complete combustion oftl1e fuel, a rapid circulation of the water, and a consequent quick generation of the steam.

The invention consists principally of an upper and a lower water-compartment, a series of inner upflow water-tubes connecting the compartments, a series of outer downflow water-tubes surrounding the said inner tubes, and a fire-box in the said lower watercompartment and having its crown-sheet eX- tending below the said inward upflow Watertubes to cause the heated water to rise directly to the upflow-tubes, the cold water flowing downward from the said outer downflow-tubes to the crown-sheet.

The invention also consists of certain parts and details and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference inclicate corresponding parts in all the figures.

Figure l is a sectional side elevation of the improvement. Fig. 2 is a sectional plan view of the same on the line 2 2 of Fig. 1, and Fig. 3 is a similar View of the same on the line 3 3 of Fig. 1.

The improved boiler is provided with shells A A, having flue-sheets B and B, located one above the other, to form with the shells the lower water-compartment C and the up- In the lower water-compartment C is arranged a fire-box D, the shell D of which extends a suitable distance inward from the shell A of the watercompartment 0, so that acircular water-leg is formed, as indicated in Fig. 1. The crownsheet D of the fire-box D carries a lower' smoke-flue D connected with the fiuesheet B and in vertical alinement with a smoke-flue E, extending from the flue-sheet B through the compartment 0 and the top sheet thereof.

A series of water-tubes F connect the sheets B and B, and the said tubes are arranged in circular rows, of which the inner row forms a space in alinement with the smoke-fines D and E, as will be readily understood by reference to the drawings. The tubes F are of comparatively small diameter and are arranged with their lower ends directly over the crown-sheet D so that the water coming in contact with the crown-sheet and being heated thereby is caused to rise directly to the lower ends of the said tubes F, to pass through the same in an upward direction and finally reach the upper compartment 0.

A series of downflow water-tubes G is arranged in a circle outside the outermost row of tubes F, so as to surround the same, as is plainly indicated in Figs. 2 and 3, the said tubes G being likewise attached to the fluesheets B and B and serving to carry the cooler water downward from the compartment 0 to the lower compartment 0 to establish a complete circulation.

It is evident that the lower ends of the larger tubes G are out of the influence of the heat emanating from the crown-sheet B so that the cooler water will readily flow down the said tubes G to the crown-sheet and waterleg of the compartment 0 to be heated, so as to rise directly to the inner tubes F, as above described. A mantle of asbestos or the like incloses the downflow water-tubes G and extends between the flue-sheets B and B, as plainly shown in the drawings.

'The smoke and gases rising from the firebox D through the flue D are caused to pass between the several tubes F and G by a coneshaped deflector H, suspended in the space formed by the innermost row of tubes F, the said deflector being located directly above the upper end of the flue D as is plainly indicated in Fig. 1. The deflector H, preferably made of fire-brick, is supported by a link I from a cone-shaped cast-iron deflector J, ar ranged a short distance below the lower end of the smoke-flue E in'the space formed by.

the innermost row of tubes F. This deflector J is carried by rods K, held on lugs K, riveted to the flue E.

It is evident that by the arrangement of deflectors the upward flow of the smoke is retarded to cause a burning of the smoke and gases in the upper part of the fire-box D and flue D so as to insure completecombustion and at the same time render the boiler comparatively smokeless.

The rising gases are deflected outwardly among the tubes F and G by the lower deflector H, and a similar deflection is caused by the upper deflector J, it being understood that the gases in rising tend to pass to the; center space to reach the flue E and in doing so strike the uppermost deflector J to be again spread outward and distributed among the tubes F and G. The gases finally pass under the flue-sheet B to the center space above thel deflectorJ to rise in the flue E to the outside.

Thedownflow water-tubes G have a'largerj areathanthe aggregate area'of allthe upflowtubes .F, so that an unobstructed circulation of the water ishad at all times.

Having thus fully described my invention, I claim as new-and desire tosecure by Letters;

Patent- 1. .A steam-boiler havingashell, a fire-box at the bottom-ofthe-shell, a flueypassingfrom the fire-box upwardly and centrally into the shell, a-flue-sheet located horizontally within the shell, and having a central orifice at the edges of which the upper end of the flue is extending upward from the central orifice in the upper flue-sheet and running centrally through the boiler to the upperendthereof,

and two dflGClJOP-PlittGS located within the central passage formed by the downflow wa-v ter-tubes, one of said deflector-plates being suspended from the uppermost flue and the second of said deflector aplates being suspended from the first-named deflector-plate, substantially as described.

2. A boiler having a shell, a fire-box at the lower portion of the shell, a flue running upward from the fire-box, a flue-sheet disposed horizontally within the shell and having a central orifice to the edges of which the upper end of the flue is connected, a second fluesheet located above the first flue-sheet and arranged horizontally within the shell, a series of water-tubes passing between the flue-sheets and disposed to leave a central passage vertically alined with the flue, a second flue eX- tending upward from the second flue-sheet and having its lower end connected with the edges of a centrally-disposed orifice in the second-named-flue-sheet,and a deflector-plate held within the passage formed by the watertubes whereby'to throw the draft outwardbetween the tubes,-substantiallyas'described.

3. A steam-boiler havingan exterior-shell or casing, a fire-box at the lower portion of the shell or casing, a flue passing upwardly from the fire-box, a flue-sheet CllSPOSGdllOlh zontally within the shell orcasing and having an orifice through which the flue communicates, a second flue-sheet located horizontally within the shell or casing and above the first flue-sheet, a series of tubespassing between the'flue-sheets and communicating with the space respectivelyabove andbelow the flue-sheets, a second flue passing upwardly froman-rorifice within the second flue-sheet and leading out of the flue or casing, the two flues being inalinement with each other, and

a deflector hung within the-space between the two flues and between the two flue -sheets whereby to throw the draft from the fire-box outward between the tubes, substantially-as described.

WILLIAM C. STUCKEL. Witnesses:

JOHN F. Home, GEORGE M. ABBOTT. 

